From 6aa366c7148e53c3731c6f417102ae45d01e490d Mon Sep 17 00:00:00 2001
From: Lynnesbian <lynne@bune.city>
Date: Sun, 27 Sep 2020 13:06:44 +1000
Subject: [PATCH] use a CSV file for the rules instead

---
 .gitignore |  2 +-
 Program.cs | 19 +++++++------------
 README.md  | 23 +++++++++--------------
 3 files changed, 17 insertions(+), 27 deletions(-)

diff --git a/.gitignore b/.gitignore
index 35d5b10..dcaa92c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,4 @@
 bin/
 obj/
 test.csv
-rules.json
+rules.csv
diff --git a/Program.cs b/Program.cs
index 448b6b7..7a9aac5 100644
--- a/Program.cs
+++ b/Program.cs
@@ -20,10 +20,8 @@ using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
-using System.Text.Json;
 using System.CommandLine.DragonFruit;
 using System.Linq;
-using System.Text.Json.Serialization;
 using CsvHelper;
 
 namespace BunyMuny {
@@ -32,18 +30,16 @@ namespace BunyMuny {
 		/// BunyMuny parses the CSV output of various bank statement listings and converts it to something more human readable with nice visualisations.
 		/// </summary>
 		/// <param name="file">The CSV file to read</param>
-		/// <param name="ruleFile">The JSON file to use for rules when parsing statement descriptions</param>
+		/// <param name="ruleFile">The CSV file to use for rules when parsing statement descriptions</param>
 		/// <returns></returns>
-		private static int Main(string file = "test.csv", string ruleFile = "rules.json") {
+		private static int Main(string file = "test.csv", string ruleFile = "rules.csv") {
 			var bank = Bank.Other;
 			var statements = new List<Statement>();
 			List<Rule> rules;
 
 			using (var ruleStreamReader = new StreamReader(ruleFile)) {
-				var jsonOptions = new JsonSerializerOptions();
-				jsonOptions.Converters.Add(new JsonStringEnumConverter(JsonNamingPolicy.CamelCase));
-				jsonOptions.WriteIndented = true;
-				rules = JsonSerializer.Deserialize<List<Rule>>(ruleStreamReader.ReadToEnd(), jsonOptions);
+				using var ruleCsv = new CsvReader(ruleStreamReader,CultureInfo.InvariantCulture);
+				rules = ruleCsv.GetRecords<Rule>().ToList();
 			}
 
 			using var sr = new StreamReader(file);
@@ -73,14 +69,13 @@ namespace BunyMuny {
 				switch (bank) {
 					case Bank.ME:
 						var value = double.Parse(csv.GetField("Debits and credits").TrimStart().Replace("$", ""));
-						// SHOW PET THIS
-						var ruleValues = MatchAgainstRules(rules, csv.GetField("Description"));
+						var (category, description) = MatchAgainstRules(rules, csv.GetField("Description"));
 
 						statements.Add(new Statement() {
 							Date = DateTime.ParseExact(csv.GetField("Date"), "dd/MM/yyyy", CultureInfo.InvariantCulture),
 							OriginalDescription = csv.GetField("Description"),
-							Description = ruleValues.Description,
-							Category = ruleValues.Category,
+							Description = description,
+							Category = category,
 							Value = value
 						});
 						break;
diff --git a/README.md b/README.md
index 9d3fdb4..9ef1b2a 100644
--- a/README.md
+++ b/README.md
@@ -13,24 +13,19 @@ dotnet build
 
 ## The rules file
 By default, BunyMuny checks for rules in `rules.json` in the current directory. An example rules file might look like this:
-```json
-[
-   {
-     "Match":"Start",
-     "Value": "Purchase Cash Converters",
-     "Category":"Personal",
-     "Description":"Cashies"
-   }
-]
+```csv
+Match,Value,Category,Description,CaseSensitive
+Start,Purchase Cash Converters,Personal,Cashies,true
 ```
-This means that any statement that starts with "Purchase Cash Converters" will be assigned the category "Personal", and the description "Cashies".
+This means that any statement that starts with "Purchase Cash Converters" (case sensitive) will be assigned the category "Personal", and the description "Cashies".
 
-- `"Match"` specifies the type of matching to perform. It can be any of the following:
+- `Match` specifies the type of matching to perform. It can be any of the following:
     - "Start": Match the start of the description.
     - "End": Match the end of the description.
     - "Contains": Match anywhere in the description.
     - "Exact": Only match if the bank statement's description is exactly equal to the provided value.
     - "Regex": Match with [regular expressions](https://en.wikipedia.org/wiki/Regular_expression).
-- `"Value"` specifies the value to match against.
-- `"Category"` is the category that the statement should be filed under.
-- `"Description"` is a short description to distinguish the particular merchant.
+- `Value` specifies the value to match against.
+- `Category` is the category that the statement should be filed under.
+- `Description` is a short description to distinguish the particular merchant.
+- `CaseSensitive` specifies whether or not the match should be case sensitive.